# 2000 Kia Sephia - runs well when cold, not when engine is warm

**URL:** <https://community.cartalk.com/t/2000-kia-sephia-runs-well-when-cold-not-when-engine-is-warm/175872>\
**Category:** Maintenance/Repairs\
**Tags:** sephia, kia\
**Created:** [March 29, 2021, 7:33pm UTC](https://community.cartalk.com/t/2000-kia-sephia-runs-well-when-cold-not-when-engine-is-warm/175872 "2021-03-29T19:33:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![vince48](https://avatars.discourse-cdn.com/v4/letter/v/2bfe46/32.png) [@vince48](https://community.cartalk.com/u/vince48)\
**Post date:** [March 29, 2021, 7:33pm UTC](https://community.cartalk.com/t/2000-kia-sephia-runs-well-when-cold-not-when-engine-is-warm/175872/1 "2021-03-29T19:33:50Z")

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it runs good when cold then when warms up if dies and wont start just spits and sputters. let it sit a while and it starts.  
Replaced plugs, fuel filter,cleaned throttle body also theres no check engine light on?

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [March 29, 2021, 11:37pm UTC](https://community.cartalk.com/t/2000-kia-sephia-runs-well-when-cold-not-when-engine-is-warm/175872/2 "2021-03-29T23:37:57Z")

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A bad crankshaft position sensor can cause that.

Tester